Add scope method direct_balance(direct_account) for Booking.by_reference.
Add scope method direct_balance(direct_account) for Booking.by_reference.

gaapt/bookyt,silvermind/bookyt,gaapt/bookyt,silvermind/bookyt,silvermind/bookyt,wtag/bookyt,hauledev/bookyt,wtag/bookyt,hauledev/bookyt,xuewenfei/bookyt,wtag/bookyt,hauledev/bookyt,hauledev/bookyt,xuewenfei/bookyt,huerlisi/bookyt,gaapt/bookyt,xuewenfei/bookyt,silvermind/bookyt,gaapt/bookyt,huerlisi/bookyt,huerlisi/bookyt